For anyone interested, here is a pic of my Kingdom Red Alert after some parts swapping with a Kingdom Sideswipe. The arms below the shoulder have been swapped, along with the feet, and the shoulder cannon barrel. This brings Red Alert a little more in line with his cartoon coloring, but it's not perfect. I would have preferred white thighs, red biceps, and black shoulders, but that would require knocking out several pins or custom painting the figure, and I don't like to modify my figures in any way that's not easily reversible. Anyway, I'm pretty pleased with the results, which look like a combination of color layouts from the original Red Alert Masterpiece release and the later MP+ "Anime Edition" release.
Here's another reversible modification you can make. It's pretty easy to pop the front wheels off, so that instead of letting them tuck away into the chest in robot mode, you can stick them on the sides of the shoulders instead for an even better match to the G1 cartoon character model (and original toy). I figure that a little parts forming is fair. Hasbro and Takara have been designing several figures in the War for Cybertron Trilogy to utilize that as a part their conversion schemes, to various degrees. The wheels, of course, weren't meant to be used like this, but it's easy to do and entirely reversible. You just have to be careful not to damage the pegs on the wheels.
I plan to do something similar with Kingdom Pipes when he is finally available here in the U.S. I suppose one could do that for Kingdom Huffer too for a more G1 toy look, but I'm happy with the wheel-less cartoon character model that the figure already creates by design.